dorsal/arxiv
View SchemaA Unified Charge-Dependent Modulation Model for AMS-02 Proton and Antiproton Fluxes during Solar Minimum
| Authors | Hui-Ming Zhang, Su-Jie Lin, Jie Feng, Jie-Teng Jiang, Li-Li Yang |
|---|---|
| Categories | |
| ArXiv ID | 2601.07649vv1 |
| URL | https://arxiv.org/abs/2601.07649 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
We develop a unified charge-dependent solar modulation model by solving the three-dimensional Parker transport equation, incorporating a realistic wavy heliospheric current sheet to treat drift effects self-consistently. Using a local interstellar spectrum from GALPROP constrained by Voyager data, we fit the model to time-resolved proton and antiproton fluxes measured by the Alpha Magnetic Spectrometer - 02 (AMS-02) during the solar-quiet period (May 2011 to June 2022). To enable rapid parameter scans, we employ neural-network-based surrogate models to compute propagation and modulation matrices efficiently. The results demonstrate that the model simultaneously describes the observed proton and antiproton fluxes with physically reasonable parameters, providing a unified account of charge-dependent modulation.
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"abstract": "We develop a unified charge-dependent solar modulation model by solving the three-dimensional Parker transport equation, incorporating a realistic wavy heliospheric current sheet to treat drift effects self-consistently. Using a local interstellar spectrum from GALPROP constrained by Voyager data, we fit the model to time-resolved proton and antiproton fluxes measured by the Alpha Magnetic Spectrometer - 02 (AMS-02) during the solar-quiet period (May 2011 to June 2022). To enable rapid parameter scans, we employ neural-network-based surrogate models to compute propagation and modulation matrices efficiently. The results demonstrate that the model simultaneously describes the observed proton and antiproton fluxes with physically reasonable parameters, providing a unified account of charge-dependent modulation.",
"arxiv_id": "2601.07649",
"authors": [
"Hui-Ming Zhang",
"Su-Jie Lin",
"Jie Feng",
"Jie-Teng Jiang",
"Li-Li Yang"
],
"categories": [
"astro-ph.HE",
"astro-ph.SR",
"physics.space-ph"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "A Unified Charge-Dependent Modulation Model for AMS-02 Proton and Antiproton Fluxes during Solar Minimum",
"url": "https://arxiv.org/abs/2601.07649",
"version": "v1"
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